CN115052243A - Dome top and manufacturing method thereof and loudspeaker - Google Patents
Dome top and manufacturing method thereof and loudspeaker Download PDFInfo
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- CN115052243A CN115052243A CN202210984065.9A CN202210984065A CN115052243A CN 115052243 A CN115052243 A CN 115052243A CN 202210984065 A CN202210984065 A CN 202210984065A CN 115052243 A CN115052243 A CN 115052243A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000001746 injection moulding Methods 0.000 claims abstract description 5
- 239000003292 glue Substances 0.000 claims description 53
- 239000012528 membrane Substances 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 11
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 17
- 239000000853 adhesive Substances 0.000 description 16
- 230000001070 adhesive effect Effects 0.000 description 16
- 239000000463 material Substances 0.000 description 12
- JHJNPOSPVGRIAN-SFHVURJKSA-N n-[3-[(1s)-1-[[6-(3,4-dimethoxyphenyl)pyrazin-2-yl]amino]ethyl]phenyl]-5-methylpyridine-3-carboxamide Chemical compound C1=C(OC)C(OC)=CC=C1C1=CN=CC(N[C@@H](C)C=2C=C(NC(=O)C=3C=C(C)C=NC=3)C=CC=2)=N1 JHJNPOSPVGRIAN-SFHVURJKSA-N 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000007769 metal material Substances 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Multimedia (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention discloses a dome, a manufacturing method thereof and a loudspeaker, wherein the dome comprises a dome body and a waterproof breathable film, the dome body is provided with a through hole penetrating through the dome body, and the waterproof breathable film is integrally formed in the through hole in an injection molding mode. The technical scheme of the invention can realize reliable combination between the waterproof breathable film and the dome body and simultaneously avoid the mass increase of the dome, thereby keeping the high sensitivity of the loudspeaker.
Description
Technical Field
The invention relates to the technical field of sound production devices, in particular to a dome, a manufacturing method of the dome and a loudspeaker.
Background
In the related art, in order to equalize the air pressure difference between the inside and the outside during the working process of the loudspeaker, a leakage hole is often required to be formed in the loudspeaker to communicate the internal space of the loudspeaker with the outside, and a waterproof breathable film is required to cover the leakage hole so as to achieve the waterproof purpose. The waterproof and breathable film is usually fixed by glue, however, when a leakage hole is selected to be formed in the dome, the glue can increase the mass of the dome, thereby reducing the sensitivity of the loudspeaker.
Disclosure of Invention
The invention mainly aims to provide a dome, which aims to prevent the mass of the dome from being increased while realizing the reliable combination between a waterproof breathable film and a dome body, thereby keeping the high sensitivity of a loudspeaker.
In order to achieve the purpose, the ball top provided by the invention comprises a ball top body and a waterproof breathable film, wherein a through hole penetrating through the ball top body is formed in the ball top body, and the waterproof breathable film is integrally formed in the through hole in an injection molding mode.
Optionally, the dome body is made of a metal material.
Optionally, the waterproof breathable film is made of polytetrafluoroethylene.
Optionally, the through hole is provided in a central region or an edge region of the dome body.
Optionally, the edge of the through hole is formed with a glue grasping structure, and the waterproof breathable film is provided with a glue grasping portion matched with the glue grasping structure.
Optionally, the waterproof breathable film includes a planar portion and a central portion, the central portion protrudes toward a direction away from the planar portion to form a convex hull structure, and in the axial direction of the dome, both side surfaces of the planar portion do not exceed both side surfaces of the dome body.
The invention also provides a manufacturing method of the dome, which is used for forming the dome, and the manufacturing method of the dome comprises the following steps:
providing a preforming mold; the pre-forming mould comprises a first mould and a second mould which are matched to form a cavity;
placing a dome body and membrane mixture into the cavity; wherein the dome body has a through hole, the membrane mixture being disposed in the through hole;
and drying the membrane mixture to form a preformed membrane integrally fixed on the dome body, wherein the dome body and the preformed membrane are combined to form the dome.
Optionally, before the step of placing the dome body and membrane mixture in the cavity, the method of making the dome further comprises:
stamping the dome body to form the through hole; or
And cutting the dome body to form the through hole.
Optionally, the edge of the through hole is provided with a glue catching structure, and the edge of the preformed film is combined with the glue catching structure through a glue catching part.
Optionally, the manufacturing method of the dome further includes:
punching the edge of the through hole to form the glue catching structure; or alternatively
Milling a groove on the edge of the through hole to form the glue catching structure; the glue grabbing structure is a glue grabbing groove.
Optionally, after the step of drying the film mixture to form a preformed film integrally fixed to the dome body, the method for manufacturing the dome further includes:
providing a drawing die; the stretching die comprises a stretching pressure head, a third die and a fourth die which are matched with each other to form a positioning cavity, the third die is provided with an avoidance groove corresponding to the preformed film, and the fourth die is provided with an avoidance through hole corresponding to the preformed film;
placing the dome body and the preformed film into the positioning cavity;
under a first preset temperature environment, the preformed film is extruded to the avoiding groove through the avoiding through hole by the stretching pressure head, so that a convex hull structure with waterproof and breathable micropores is stretched on the preformed film;
and sintering and shaping the convex hull structure on the preformed film under a second preset temperature environment to form the waterproof breathable film.
The invention further provides a loudspeaker, which comprises a shell, and a magnetic circuit system and a vibration system which are arranged on the shell, wherein the vibration system comprises a vibration diaphragm, and the vibration diaphragm comprises the ball top or the ball top manufactured by the manufacturing method of the ball top.
According to the technical scheme, the waterproof breathable film is integrally formed in the through hole of the dome body in an injection molding mode, and the waterproof breathable film and the dome body are reliably combined under the condition that adhesives such as glue and the like are not additionally added, so that the mass of the dome can be prevented from being increased, and the high sensitivity of the loudspeaker with the dome is kept. In addition, through the setting of waterproof ventilated membrane, can realize the atmospheric pressure of the balanced vibrating diaphragm both sides that are equipped with this dome when waterproof, make the vibrating diaphragm vibration more stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a dome of the present invention;
FIG. 2 is a schematic diagram of an exploded view of the dome of FIG. 1;
FIG. 3 is a schematic structural diagram of a preforming mold used in the method for manufacturing a dome according to the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic structural diagram of a drawing die used in the method for manufacturing a dome according to the present invention before drawing;
FIG. 6 is a schematic view of the drawing die of FIG. 5 after drawing;
fig. 7 is a schematic structural diagram of a speaker according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name(s) |
| 10 | First die | 20 | |
| 30 | Third die | 40 | Fourth die |
| 31 | Avoiding |
41 | Avoiding through |
| 50 | |
1 | Ball top body |
| 1a | Through |
1b | Glue grasping groove |
| 2’ | Preformed |
2 | Waterproof |
| 21 | |
22 | Center part |
| 2a | Convex hull structure | 3 | |
| 4 | |
23 | Glue grasping part |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a ball top.
Referring to fig. 1 to 6, in an embodiment of the present invention, the dome includes a dome body 1 and a waterproof breathable film 2, a through hole 1a penetrating through the dome body 1 is formed in the dome body 1, and the waterproof breathable film 2 is integrally injection-molded in the through hole 1 a.
In the invention, optionally, the through hole 1a may be formed by stamping the dome body 1, so that the batch preparation of the dome body 1 is facilitated, and the batch preparation efficiency of the dome is improved. However, the design is not limited thereto, and in other embodiments, the through hole 1a may also be formed by cutting, such as but not limited to laser cutting, water jet cutting, and the like.
In the invention, optionally, the dome body 1 is made of a metal material, such as but not limited to an aluminum magnesium alloy material, and the metal material has a good high temperature resistance, so that unnecessary deformation of the dome body 1 can be avoided in a drying stage of integral injection molding; however, the design is not limited thereto, and in other embodiments, the dome body 1 may be made of other materials with good high temperature resistance. Optionally, the waterproof breathable film 2 is made of polytetrafluoroethylene, and the polytetrafluoroethylene can form waterproof breathable micropores after being expanded, so that waterproof breathable requirements of the dome body 1 at the through hole 1a can be met; of course, in other embodiments, other materials with waterproof and breathable functions can be used for the waterproof and breathable film 2.
According to the technical scheme, the waterproof breathable film 2 is integrally injection-molded in the through hole 1a of the dome body 1, and the waterproof breathable film 2 is reliably combined with the dome body 1 under the condition that adhesives such as glue and the like are not additionally added, so that the mass of the dome can be prevented from being increased, and the high sensitivity of the loudspeaker with the dome is kept. In addition, through the setting of waterproof ventilated membrane 2, can realize the atmospheric pressure of the balanced vibrating diaphragm both sides that are equipped with this ball top when waterproof, make the vibrating diaphragm vibration more stable.
In an embodiment of the present invention, referring to fig. 2 and fig. 6, one waterproof breathable film 2 is formed, and the waterproof breathable film 2 is located in the central area of the dome body 1 to meet the requirement of the dome of one waterproof breathable film 2. However, the design is not limited thereto, in other embodiments, a plurality of waterproof breathable films 2 may be formed, and the plurality of waterproof breathable films 2 are scattered at the edge area of the dome body 1 to meet the requirement of the dome of the plurality of waterproof breathable films 2; for example, when the dome body 1 is rectangular, four waterproof breathable films 2 may be provided, and the four waterproof breathable films 2 may be dispersedly disposed at positions close to four corners of the dome body 1.
In an embodiment of the present invention, referring to fig. 2 to 4, a glue catching structure is formed at an edge of the through hole 1a, and the waterproof breathable film 3 is provided with a glue catching portion 23 matched with the glue catching structure, so as to improve connection stability and reliability between the waterproof breathable film 2 and the edge of the through hole 1 a. Optionally, the glue grabbing structure is configured to be a glue grabbing groove 1b formed in at least one side surface of the edge of the through hole 1a, and the glue grabbing portion 23 is embedded in the glue grabbing groove 1b, so as to improve the connection stability and reliability between the waterproof breathable film 2 and the edge of the through hole 1 a; alternatively, the glue grasping groove 1b may be formed by, but not limited to, punching, milling a groove, or the like. However, the design is not limited to this, in other embodiments, the glue catching structure may be configured as a plurality of glue catching hooks protruding on the hole wall surface of the through hole 1a, the glue catching hooks are arranged at intervals along the circumferential direction of the through hole 1a, and the glue catching hooks are embedded into the edge of the waterproof breathable film 2 (i.e., the glue catching portions 23), so that the connection stability and reliability between the waterproof breathable film 2 and the edge of the through hole 1a can also be improved.
Optionally, the glue grasping groove 1b is annularly arranged, that is, the glue grasping groove 1b is arranged around the through hole 1a, so that the glue grasping portion 23 has an embedded structure with improved stability with the dome body 1 at each position in the circumferential direction of the through hole 1 a. Further optionally, the glue catching groove 1b is arranged in a continuous ring shape, or the glue catching groove 1b is arranged in an intermittent ring shape.
Furthermore, the glue grabbing grooves 1b are formed in two opposite side faces of the edge of the through hole 1a, namely, the two opposite side faces of the edge of the through hole 1a and the waterproof breathable film 2 are provided with an embedded structure, so that the connection stability and reliability between the waterproof breathable film 2 and the dome body 1 are improved. However, the design is not limited thereto, and in other embodiments, the adhesive catching groove 1b may be disposed on only one side surface of the edge of the through hole 1 a.
In an embodiment of the present invention, referring to fig. 1 and 2, the waterproof breathable film 2 includes a planar portion 21 and a central portion 22, and the central portion 22 is raised in a direction away from the planar portion 21 to form a convex hull structure 2a, so as to help raise the eigenfrequency of the dome, thereby improving the sound effect of the speaker with the dome. It should be noted that, when the dome is assembled into a speaker, the convex hull structure 2a may be protruded toward the inside of the speaker housing, or may be protruded toward the outside of the speaker housing, which is not limited in the present invention.
Optionally, in the axial direction of the dome, both side surfaces of the planar portion 21 do not exceed both side surfaces of the dome body 1, so that the waterproof and breathable film 2 is made of less material and has a lower overall weight, and the sensitivity of the speaker with the dome is higher; typically, the thickness of the waterproof breathable film 2 is not greater than the thickness of the dome body 1. In addition, when the two side surfaces of the plane part 21 are flush with the two side surfaces of the dome body 1, the cavity structure of the injection mold for integrally injecting the dome can be simpler, and the research and development cost is lower.
The invention also provides a manufacturing method of the dome.
Referring to fig. 1 to 4, in an embodiment of the present invention, a method for manufacturing the dome includes the steps of:
s10, providing a pre-forming mold; the pre-forming mold comprises a first mold 10 and a second mold 20 which cooperate to form a cavity;
s20, placing the dome body 1 and the membrane mixture into the cavity; wherein the dome body 1 has a through hole 1a, and the film mixture is disposed in the through hole 1 a;
and S30, drying the film mixture to form a preformed film 2 'integrally fixed on the dome body 1, wherein the dome body 1 and the preformed film 2' are combined to form the dome.
Without loss of generality, in the present invention, the first mold 10 is configured as a female mold, the second mold 20 is configured as a flat mold, and the second mold 20 covers the first mold 10, thereby forming the cavity. However, the design is not limited thereto, and in other embodiments, the second film may also be configured as a female die or a male die, as long as the shape and size of the cavity formed between the first die 10 and the second die 20 match with the shape and size of the ball top to be manufactured, so that the manufactured ball top meets the design requirements.
In the present invention, optionally, the dome body 1 is made of a metal material, such as but not limited to an aluminum magnesium alloy, and the metal material has a good high temperature resistance, so that unnecessary deformation of the dome body 1 can be avoided when the film mixture is dried; however, the design is not limited thereto, and in other embodiments, the dome body 1 may be made of other materials with good high temperature resistance. Optionally, the membrane mixture is made of polytetrafluoroethylene, and the polytetrafluoroethylene can form waterproof and breathable micropores after expansion, so that waterproof and breathable requirements of the dome body 1 at the through hole 1a can be met; of course, in other embodiments, other materials with waterproof and air-permeable functions can be used for the membrane mixture.
According to the technical scheme, the dome body 1 and the film mixture are placed in the cavity of the preforming mold, then the film mixture is dried and fixed on the dome body 1, so that the dome comprising the preformed film 2 'and the dome body 1 is formed, and the preformed film 2' and the dome body 1 are reliably combined under the condition that adhesives such as glue and the like are not additionally added, so that the mass of the dome can be prevented from being increased, and the high sensitivity of the loudspeaker with the dome is kept. In addition, through the setting of waterproof ventilated membrane 2, can realize the atmospheric pressure of the balanced vibrating diaphragm both sides that are equipped with this ball top when waterproof, make the vibrating diaphragm vibration more stable.
In an embodiment of the present invention, the step S20 generally specifically includes: firstly, placing the dome body 1 into a cavity of the first die 10, and closing the second die 20 and the first die 10, so that only the position of the through hole 1a in the cavity is left for injecting the film mixture, and then injecting the film mixture into the position of the through hole 1 a; namely, the mode of firstly closing the die and then injecting the material is adopted.
However, the design is not limited thereto, in other embodiments, the material may be injected first, and then the second die 20 is used to extrude the film mixture to fill the position of the through hole 1a, specifically, the step S20 specifically includes: firstly, the dome body 1 is placed into the cavity of the first die 10, then the film mixture with a preset weight is injected into the through hole 1a of the dome body 1, and then the second die 20 and the first die 10 are closed, so that the film mixture in the through hole 1a is extruded and flattened by the second die 20 to fill the position of the through hole 1a, and the dried preformed film 2' can be stably combined with the edge of the through hole 1 a.
In an embodiment of the present invention, before the step S20, the method for manufacturing the dome further includes:
and S40, stamping the dome body 1 to form the through hole 1 a.
The stamping mode is favorable for realizing the batch preparation of the dome body 1, thereby being favorable for improving the batch preparation efficiency of the dome.
However, the design is not limited thereto, and in other embodiments, the through hole 1a may also be formed by cutting, such as but not limited to laser cutting, water jet cutting, etc.; specifically, in this embodiment, before the step S20, the method for manufacturing the dome further includes:
s40', the dome body 1 is cut to form the through-hole 1 a.
In an embodiment of the present invention, an adhesive catching structure is disposed at an edge of the through hole 1a, and an edge of the preformed film 2 'is matched with the adhesive catching structure through an adhesive catching portion 23, so as to improve connection stability and reliability between the preformed film 2' and the edge of the through hole 1 a. Optionally, the glue catching structure is configured as a glue catching groove 1b formed in at least one side surface of the edge of the through hole 1a, and the glue catching portion 23 is embedded in the glue catching groove 1b to improve the connection stability and reliability between the preformed film 2' and the edge of the through hole 1 a; however, the design is not limited thereto, and in other embodiments, the adhesive catching structure may be configured as a plurality of adhesive catching hooks protruding on the hole wall surface of the through hole 1a, the plurality of adhesive catching hooks being arranged at intervals along the circumferential direction of the through hole 1a, and the adhesive catching hooks being embedded into the edge of the preformed film 2 '(i.e., the adhesive catching portions 23), so that the connection stability and reliability between the preformed film 2' and the edge of the through hole 1a can also be improved.
Optionally, the glue grasping groove 1b is annularly arranged, that is, the glue grasping groove 1b is arranged around the through hole 1a, so that the glue grasping portion 23 has an embedded structure with the dome body 1 at each position in the circumferential direction of the through hole 1a to improve stability. Further optionally, the glue catching groove 1b is arranged in a continuous ring shape, or the glue catching groove 1b is arranged in an intermittent ring shape.
Furthermore, the two opposite side surfaces of the edge of the through hole 1a are both provided with the glue catching grooves 1b, that is, the two opposite side surfaces of the edge of the through hole 1a and the preformed film 2 'both have an embedded structure, so that the connection stability and reliability between the preformed film 2' and the dome body 1 are improved. However, the design is not limited thereto, and in other embodiments, the adhesive catching groove 1b may be disposed on only one side surface of the edge of the through hole 1 a.
In an embodiment of the present invention, the method for manufacturing the dome further includes:
and S50, punching the edge of the through hole 1a to form the adhesive catching structure.
The stamping mode is favorable for realizing the batch preparation of the dome body 1, thereby being favorable for improving the batch preparation efficiency of the dome. In particular, when the through hole 1a is also formed by stamping, the stamping step of the adhesive grasping structure may be the same as the stamping step of the through hole 1a, that is, the through hole 1a is stamped by one-time stamping, and the adhesive grasping structure is stamped at the edge of the through hole 1 a; therefore, the preparation process of the whole product can be saved, and the preparation efficiency of the product is improved.
However, the design is not limited thereto, and in other embodiments, when the glue grasping structure is configured as the glue grasping groove 1b, the glue grasping structure may also be formed by milling a groove; under this embodiment, specifically, the manufacturing method of the dome further includes:
s50', the edge of the through-hole 1a is milled to form the catching structure.
In an embodiment of the present invention, referring to fig. 5 and 6, after step S30, the method for manufacturing the dome further includes:
s60, providing a stretching die; the stretching die comprises a stretching pressure head 50, a third die 30 and a fourth die 40 which are matched with each other to form a positioning cavity, the third die 30 is provided with an avoiding groove 31 corresponding to the preformed film 2 ', the fourth die 40 is provided with an avoiding through hole 41 corresponding to the preformed film 2', and the stretching pressure head 50 can penetrate through the avoiding through hole 41;
s70, placing the dome body 1 and the preformed film 2' into the positioning cavity;
s80, under a first preset temperature environment, extruding the preformed film 2 'to the avoiding groove 31 through the avoiding through hole 41 by the stretching ram 50, so as to stretch a convex hull structure 2a with waterproof and breathable micropores on the preformed film 2';
and S90, sintering and shaping the convex hull structure 2a on the preformed film 2' under a second preset temperature environment to form the waterproof breathable film 2.
Without loss of generality, in the present invention, the third mold 30 is configured as a female mold, the fourth mold 40 is configured as a flat mold, and the fourth mold 40 covers the third mold 30, thereby forming the positioning cavity. However, the design is not limited thereto, and in other embodiments, the fourth film may also be configured as a female die or a male die, as long as the shape and the size of the positioning cavity formed between the third die 30 and the fourth die 40 match with the shape and the size of the ball top to be manufactured.
In this embodiment, the material used for the pre-formed film 2' is, for example, polytetrafluoroethylene, and the waterproof breathable film 2 is formed by performing the steps S60 to S90 as described above, since the waterproof breathable film is formed by stretching and expanding the material. However, the design is not limited thereto, and in other embodiments, the preformed film 2 'may be prepared by using a material that can form waterproof and breathable pores after being dried, in which case, the preformed film 2' obtained by performing the step S30 is the waterproof and breathable film 2.
In this embodiment, taking teflon as an example, the temperature range of the first predetermined temperature environment is usually 160 ℃ to 190 ℃, and the temperature range of the second predetermined temperature environment is usually 365 ℃ to 375 ℃, so that after the convex hull structure 2a on the preformed film 2' is sintered and shaped, it is usually required to take out the convex hull structure through a cooling opening. Of course, in other embodiments, when other materials are used, the respective temperature ranges of the first preset temperature environment and the second preset temperature environment may be adjusted according to the requirements of the materials.
It should be noted that, when the dome is assembled into a speaker, the convex hull structure 2a may be protruded toward the inside of the speaker housing, or may be protruded toward the outside of the speaker housing, which is not limited in the present invention.
In this embodiment, the shape and the size of the avoiding groove 31 correspond to those of the convex hull structure 2a, that is, the avoiding groove 31 is a profiling groove, and the stretching ram 50 will press the preformed film 2 'to be attached to the groove wall of the avoiding groove 31 in the process of pressing the preformed film 2'; in this way, the shape and size of the convex hull structure 2a can be obtained by setting the shape and size of the relief groove 31. However, the design is not limited thereto, and in other embodiments, the depth of the avoiding groove 31 may be larger than the height of the convex hull structure 2a, which is not limited by the present invention.
In an embodiment of the present invention, referring to fig. 2 and fig. 6, one waterproof breathable film 2 is formed, and the waterproof breathable film 2 is located in the central area of the dome body 1 to meet the requirement of the dome of one waterproof breathable film 2. However, the design is not limited thereto, in other embodiments, a plurality of waterproof breathable films 2 may be formed, and the plurality of waterproof breathable films 2 are scattered at the edge area of the dome body 1 to meet the requirement of the dome of the plurality of waterproof breathable films 2; for example, when the dome body 1 is rectangular, four waterproof breathable films 2 may be provided, and the four waterproof breathable films 2 may be dispersedly disposed at positions close to four corners of the dome body 1.
The present invention further provides a dome, and the manufacturing method of the dome specifically refers to the above embodiments, and since the dome adopts all technical solutions of all the above embodiments, the dome at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.
The present invention further provides a speaker, referring to fig. 7, the speaker includes a housing 3, a magnetic circuit system and a vibration system which are disposed in the housing 3, the vibration system includes a diaphragm, the diaphragm includes a dome, and the structure or the manufacturing method of the dome specifically refer to the above embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (11)
1. The utility model provides a dome, its characterized in that includes dome body and waterproof ventilated membrane, be equipped with on the dome body and run through the through-hole of dome body, waterproof ventilated membrane an organic whole injection moulding in the through-hole.
2. The dome of claim 1 wherein the dome body is metallic; and/or the waterproof breathable film is made of polytetrafluoroethylene.
3. The dome of claim 1 wherein the through-hole is provided in a central region or an edge region of the dome body.
4. The dome according to claim 1, wherein a catch structure is formed at the edge of the through hole, and the waterproof air-permeable membrane is provided with a catch portion that mates with the catch structure.
5. The dome of claim 1, wherein the waterproof, breathable membrane comprises a planar portion and a central portion, the central portion being convex in a direction away from the planar portion to form a convex hull structure, and both side surfaces of the planar portion do not extend beyond both side surfaces of the dome body in an axial direction of the dome.
6. A method of manufacturing a dome for forming a dome as claimed in any one of claims 1 to 5, comprising the steps of:
providing a preforming mold; the pre-forming mould comprises a first mould and a second mould which are matched to form a cavity;
placing a dome body and membrane mixture within the cavity; wherein the dome body has a through hole, the membrane mixture being disposed within the through hole;
and drying the membrane mixture to form a preformed membrane integrally fixed on the dome body, wherein the dome body and the preformed membrane are combined to form the dome.
7. The method of making a dome of claim 6, wherein prior to the step of placing the dome body and membrane mixture in the cavity, the method of making a dome further comprises:
stamping the dome body to form the through hole; or
And cutting the dome body to form the through hole.
8. The method for manufacturing a dome according to claim 6, wherein an edge of the through hole is provided with a catch structure, and an edge of the pre-form film is bonded to the catch structure through a catch portion.
9. The method of making a dome of claim 8, further comprising:
punching the edge of the through hole to form the glue catching structure; or
Milling a groove on the edge of the through hole to form the glue catching structure; the glue grasping structure is a glue grasping groove.
10. The method of making a dome of claim 6, wherein after the step of drying the membrane mixture to form a preformed membrane integrally secured to the dome body, the method of making a dome further comprises:
providing a drawing die; the stretching die comprises a stretching pressure head, a third die and a fourth die which are matched with each other to form a positioning cavity, the third die is provided with an avoidance groove corresponding to the preformed film, and the fourth die is provided with an avoidance through hole corresponding to the preformed film;
placing the dome body and the preformed film into the positioning cavity;
under a first preset temperature environment, the preformed film is extruded to the avoiding groove through the avoiding through hole by the stretching pressure head, so that a convex hull structure with waterproof and breathable micropores is stretched on the preformed film;
and sintering and shaping the convex hull structure on the preformed film under a second preset temperature environment to form the waterproof breathable film.
11. A loudspeaker comprising a housing, a magnetic circuit system provided in the housing, and a vibration system, the vibration system comprising a diaphragm, the diaphragm comprising the dome according to any one of claims 1 to 5 or the dome manufactured by the method of manufacturing the dome according to any one of claims 6 to 10.
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| CN202210984065.9A CN115052243B (en) | 2022-08-17 | 2022-08-17 | Ball top, manufacturing method thereof and loudspeaker |
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| CN202210984065.9A CN115052243B (en) | 2022-08-17 | 2022-08-17 | Ball top, manufacturing method thereof and loudspeaker |
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| CN117177151A (en) * | 2023-11-03 | 2023-12-05 | 共达电声股份有限公司 | Vibrating diaphragm assembly, loudspeaker and manufacturing method of vibrating diaphragm assembly |
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| CN115052243B (en) | 2024-04-09 |
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